CN104771281B - Multifunctional wheelchair - Google Patents

Abstract

The invention relates to a multifunctional wheelchair, which includes a wheelchair frame, a reciprocating motion conversion mechanism, a switchable overrunning clutch mechanism, a five-item seat linkage mechanism, a retractable and retractable storage board mechanism, and a seat board that is convenient for going to the toilet and cleaning. The combination of motion conversion mechanism, switchable overrunning clutch mechanism and manual brake mechanism completes the conversion of the linear reciprocating motion of the armrest into circular reciprocating motion, and then into the circular motion of the synchronous belt drive wheel, allowing the user to drive the wheelchair only relying on the armrest. Wheel forward/reverse movement and braking. The five-item seat linkage mechanism makes the five aspects of the headrest, folding backrest, backrest, seat board and footrests simultaneously linked, so that the user can adjust the sitting posture at any time, allowing the body to stretch, which is beneficial to the rehabilitation of sedentary patients. The retractable and retractable storage board mechanism is convenient for placing items on the wheelchair, making daily activities such as eating, writing, and surfing the Internet more convenient for users.

Description

multipurpose wheelchair

technical field

The invention belongs to the field of wheelchairs, in particular to a multifunctional wheelchair which is beneficial to health and facilitates going to the toilet.

Background technique

Current manual wheelchairs basically rely on manually driving the handwheels on both sides of the wheelchair to drive the movement of the driving wheels. It requires the user to open his arms, lean forward, and turn the handwheels. Although the transmission method of the hand wheel and the driving wheel is direct, the way for the user to turn the hand wheel is extremely inconvenient and easily fatigued. Especially when the road surface has a slope, it is even more difficult to control. Such wheelchairs are more from the perspective of convenient care, so we see that such wheelchairs are usually in a state of motion being pushed by the nursing staff.

At present, the seats of wheelchairs with good quality are all designed according to the principles of ergonomics. Some backrest angles are adjustable, and some foot pedal linkage angles are adjustable. However, this adjustment is mostly done by nursing staff, and some electric wheelchairs can They are adjusted separately by electric means, but most of them are limited to the adjustment of the angle of the backrest and the pedal linkage, which is far from enough for patients who have been sitting in wheelchairs for a long time. In the daily life of a normal person, it is often switching between different seats such as office chairs, leisure chairs, sofas, recliners, etc., and each state has its own different ergonomic design requirements. Not only that, but after sitting for a while, people will unconsciously change their sitting posture from left to right. After sitting for a long time, they need to stand up and stretch their bodies. From this we can see that the current design of wheelchair seats is far from enough for disabled people who have to sit for a long time. Furthermore, when the user drives the wheelchair, he cannot hold items in his hand at the same time, such as water cups, etc., and this inconvenience is often encountered in daily life.

The problem of going to the toilet is often one of the key factors for the dependence of the disabled on the nursing staff. The current solution is to place a potty under the wheelchair seat, which still requires a nursing staff, and the other is to sit on a toilet chair. This method requires the patient to switch between the two, and switching between the four wheeled seats is not something that can be easily and safely done by people with lower limb disabilities.

In view of above-mentioned defective, this designer actively researches and innovates, in order to create a kind of multifunctional wheelchair, makes it have industrial utilization value more.

Contents of the invention

In order to solve the above-mentioned technical problems, the object of the present invention is to provide a multifunctional wheelchair that is easy to operate, can adjust the sitting posture at any time, and is convenient to use.

The multifunctional wheelchair of the present invention comprises a wheelchair frame with universal wheels and driving wheels at the bottom, a seat board, a backrest and a pedal, and a reciprocating motion conversion mechanism is respectively installed on both sides of the armrest of the wheelchair frame. The reciprocating motion conversion mechanism includes a reciprocating motion armrest, a support rod, a pulley, a guide rail, a swing connecting rod, a rotating shaft, a swing rod with a slide rail, a swing slider, and a set of switchable overrunning clutch mechanisms. The support rod is connected with the pulley arranged in the guide rail, and the lower part of the pulley is connected with two hinged swing links. Connected to the wheelchair frame, a swing slider is arranged in the swing rod with a slide rail, and the swing slider is connected with the switchable overrunning clutch mechanism, and the linear reciprocating motion of the reciprocating armrest is converted into swing through the reciprocating motion conversion mechanism The circular movement of the slider drives the forward or reverse movement of the driving wheel of the wheelchair through a switchable overrunning clutch mechanism.

Further, the switchable overrunning clutch mechanism includes a lock block connecting rod, a rotating shaft, forward or reverse overrunning clutch, the locking block connecting rod connects the swing slider to the rotating shaft, and the rotating shaft is connected to the wheelchair frame through a bearing On the top, the rotating shaft is connected with the forward or reverse overrunning clutch, and a synchronous belt driving wheel is arranged on the rotating shaft, and the synchronous belt driving wheel is connected with the coaxial synchronous belt driven wheel of the wheelchair driving wheel through the synchronous belt, and the inner side of the synchronous belt driving wheel Both ends are provided with spring lock blocks, and the two spring lock blocks are respectively fixed on the two ends of the lock block connecting rod. A radial slide rail, when the gear is rotated, the connecting rod slider drives the lock block connecting rod to move up and down under the limit of the radial slide rail, and there are two buckles on the outside of the connecting rod slide rail to lock the state of the connecting rod , there is a swingable dial on the outside of the gear, the dial is connected with the steering control handle through the dial connecting rod, when the direction needs to be reversed, turn the steering control handle, drive the dial to engage the gear, and the gear drives the lock block connecting rod to move, thus The original locking block is driven to disengage, and the other locking block is locked at the same time, thereby completing the steering control.

Further, the multifunctional wheelchair also includes a five-item seat linkage mechanism. The five-item seat linkage mechanism includes the simultaneous linkage of the seat board, footrest, backrest, folding backrest and headrest. The lower part of the front end of the seat board is hinged with a footrest The board connecting rod, the lower end of the pedal connecting rod is fixedly connected with the pedal, the headrest and the folding backrest are connected through a multi-stage hinged connecting rod and a folding lock, and the folding backrest is connected with the backrest through a multi-stage hinged connecting rod, folding lock and For connection, there is a lumbar spring steel sheet on the backrest, the lumbar cushion is set close to the lumbar spring steel sheet, and an air pressure rod is provided on the lower side of the backrest. The air pressure rod is a controllable air pressure rod, and one end of the air pressure rod is hinged to the wheelchair frame At the rear end, the other end of the air pressure rod is hinged to the seat board. Sliders are provided at the front ends of both sides of the seat board. The backrest is hinged with the seat board. rail and an arc slide rail, and a linear slide rail and an arc slide rail are respectively provided at the front and back of the wheelchair frame right side.

Further, the linkage part between the seat board and the footboard includes an L-shaped paddle, a paddle slide rail and a wheelchair frame slide rail, the L-shaped paddle is hinged on the wheelchair frame, and the L-shaped paddle is provided with a paddle slide rail , the paddle slide rail and the wheelchair frame slide rail form a set angle, the slider at the front end of the seat plate is set in the paddle slide rail and the wheelchair frame slide rail at the same time, the slider is also hinged with a front push rod, and the other end of the front push rod is connected to the wheelchair frame slide rail. The pedal connecting rod is hinged, and when the slider moves forward, the paddle slide rail gradually overlaps with the wheelchair frame slide rail, and the other end of the L-shaped paddle slowly lifts up the seat board, and at the same time pushes the pedal connecting rod to lift up.

Further, the linkage part of the backrest, folding backrest and headrest includes a fixed chute, a rotatable locking chute, a push rod slider, a lumbar spring steel sheet, a folding backrest, a headrest, a multi-stage hinged link and a sliding The fixed chute is set on the wheelchair frame, and the rotatable locking chute is set on the backrest. When the backrest is reclined, the push rod slider comes out of the fixed chute and moves to the rotatable locking chute. The movement of the rod drives the flattening of the lumbar cushion and the erection of the folding backrest and the headrest. When the push rod slide block enters the rotatable locking chute, the push rod slide block is locked, and the backrest can continue to adjust the inclination backward.

Further, the middle part of the seat board is an elliptical hole, and there are two rectangular soft cushions on the seat board. The oval hole position of the seat board is provided with a cushion board that coincides with the ellipse and is divided into two left and right pieces. The texture of the board is the same as the seat board.

Further, the multifunctional wheelchair also includes a manual brake mechanism, which is arranged under the reciprocating armrest, and includes a disc brake and a brake handle, one end of the disc brake and one end of the brake handle are respectively hinged on the wheelchair frame, The disc brake and the brake handle are connected by a brake cable, and the top of the brake handle is provided with a spring lock.

Further, the multifunctional wheelchair also includes a retractable and retractable storage board mechanism, which is arranged under the reciprocating armrests on both sides of the wheelchair, including a storage board, a hinged connecting rod, a storage board and a hinge The connecting rod is connected by a rotatable lock. After the storage board is unfolded, the knob on the storage board is rotated to connect the storage boards on both sides into one.

Further, a base plate with the same oval shape as the seat plate is provided under the seat plate, a hinge is provided on the lower side of the seat plate, the hinge is connected to the base plate through a hinge buckle, and the other side of the base plate is connected to the base plate through a lock buckle. Under the seat board.

Further, the left and right cushion boards can be connected with the upper soft cushion as a whole, or can be used independently.

By means of the above solution, the present invention has at least the following advantages:

1. The operation is flexible and convenient. This invention converts the reciprocating motion of the armrest into the circular motion of the swing slider through the reciprocating motion conversion mechanism and the switchable overrunning clutch mechanism, so that the user can perform reciprocating motion only by relying on the armrest, eliminating the need to use It is troublesome to turn the wheels by hand, especially when running on a slope, due to the intervention of the switchable overrunning clutch mechanism, it is more convenient for the user to apply force; moreover, the telescopic headrest and folding backrest make the wheelchair small and flexible when running, and easy to use when relaxing. It can be opened in time to provide necessary support for the user.

2. The five-item seat linkage mechanism completes the five seats of the seat board, footrest, backrest, folding backrest and headrest through the synergistic effect of the hinged connecting rod, the rotating shaft, the lock block, the slider, the chute and the air pressure bar. Simultaneous linkage of aspects allows the user to sit or lie down, and can adjust the sitting posture at any time, and the pressure-bearing parts of the body will also change accordingly, helping users to solve the problem of bedsores caused by sitting for a long time; at the same time, the linkage of the whole body is also helpful. The user's requirements for physical activity and proper exercise, and the passive movement of the lower limbs are also extremely beneficial to the rehabilitation of the patient.

3. The seat board with oval holes makes it more convenient for users to go to the toilet. When the user goes to the toilet, the left and right soft cushions and seat boards are removed respectively. The bottom plate is removed for cleaning, thereby ensuring that the entire wheelchair is clean and hygienic.

4. The storage boards located under the armrests on both sides are connected to the hinged connecting rods through rotatable locks. After the storage boards are unfolded, the knobs on the storage boards can be rotated to connect the storage boards on both sides into one, which is convenient Users place items on the wheelchair to make daily activities such as eating, writing, and surfing the Internet more convenient.

The above description is only an overview of the technical solutions of the present invention. In order to understand the technical means of the present invention more clearly and implement them according to the contents of the description, the preferred embodiments of the present invention and accompanying drawings are described in detail below.

Description of drawings

Fig. 1 is a side view of the wheelchair of the present invention;

Fig. 2 is a wheelchair manual transmission mechanism diagram of the present invention;

Fig. 3 is an axial view of the overrunning clutch switching mechanism;

Fig. 4 is an outer radial diagram of the overrunning clutch switching mechanism;

Fig. 5 is a buckle diagram of the overrunning clutch switching mechanism;

Fig. 6 is a diagram of the radial lock block mechanism of the overrunning clutch switching mechanism;

Fig. 7 is a wheelchair seat deflection diagram;

Fig. 8 is a side view of the wheelchair seat;

Fig. 9 is a side view of the wheelchair seat seat plate linkage mechanism;

Fig. 10 is the linkage mechanism diagram of the lower part of the wheelchair backrest;

Fig. 11 is a schematic diagram of backward tilting of the linkage mechanism at the lower part of the wheelchair backrest;

Figures 12 and 13 are linkage mechanism diagrams of the lumbar cushion in the middle part of the backrest of the wheelchair;

Figures 14 and 15 are diagrams of the wheelchair backrest folding backrest linkage mechanism;

Figures 16 and 17 are linkage mechanism diagrams of the wheelchair backrest headrest;

Figure 18-20 is a state diagram of the wheelchair linkage process;

Fig. 21 is a schematic diagram of the wheelchair retractable storage board;

Fig. 22 is a mechanism diagram of the detachable toilet seat of the wheelchair.

1 reciprocating armrest; 2 support rod; 3 pulley; 4 guide rail; 5 swing connecting rod; 6 synchronous belt; 7 swing rod with slide rail; 8 swing slider; 11 synchronous belt drive wheel; 12 spring lock block; 13 lock block connecting rod; 14 connecting rod slide rail; 15 connecting rod slider; 16 gear; 17 radial slide rail; Rod; 21 steering control handle; 22 multi-stage hinged link; 23 synchronous belt driven wheel; 24 headrest; 25 folding backrest; 26 backrest; 27 pedal; 28 pedal connecting rod; Lock block; 31 air pressure rod; 321, 322 slider; 33 arc slide rail; 34 L-shaped paddle; 35 paddle slide rail; 36 front push rod; 37 seat board; 40 waist cushion; 41 soft cushion; 42 seat cushion Plate; 43 bottom plate; 44 hinge; 45 fixed chute; 46 lock; 47 shelf; 48 hinged link; 49 knob; 501,502 rocker; 51 folding lock; 52 universal wheel; 54 shift fork; 55 secondary shift block; 56 block; 57, 58, 59, 71, 72 axis; 60, 68, 65 push rod; 61, 63, 69 chute; ; 66, 67, 70, 73, 74 hinge points; 75 rotatable locking chute.

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Referring to Fig. 1-22, a kind of multifunctional wheelchair described in a preferred embodiment of the present invention comprises the wheelchair frame that universal wheel 52 and driving wheel 53 are equipped with at the bottom, and wheelchair frame is provided with seat board 37, backrest 26 and foot Pedal 27, the both sides of armrest of wheelchair frame are equipped with reciprocating motion conversion mechanism respectively, described reciprocating motion conversion mechanism comprises reciprocating motion armrest 1, support bar 2, pulley 3, guide rail 4, swing connecting rod 5, rotating shaft 9, Swing rod 7 with slide rail, swing slider 8 and a set of switchable overrunning clutch mechanism, the bottom of the reciprocating handrail 1 is connected with the pulley 3 arranged in the guide rail 4 through the support rod 2, and the bottom of the pulley 3 is connected with two The hinged swing link 5 is connected, one end of the swing link 7 with slide rail is hinged with the swing link 5, and the other end of the swing link 7 with slide rail is connected to the wheelchair frame through a bearing, and the swing link 7 with slide rail A swing slider 8 is arranged inside, and the swing slider 8 is connected with the switchable overrunning clutch mechanism, and the linear reciprocating motion of the reciprocating handrail is converted into the circular motion of the swing slider through the reciprocating motion conversion mechanism, and then through the switchable The overrunning clutch mechanism drives the driving wheel of the wheelchair to move forward or reversely.

The switchable overrunning clutch mechanism includes a lock block connecting rod 13, a rotating shaft 9, and a forward or reverse overrunning clutch 10. The locking block connecting rod 13 connects the swing slider 8 to the rotating shaft 9, and the rotating shaft 9 passes through a bearing Connected on the wheelchair frame, the rotating shaft 9 is connected with the forward or reverse overrunning clutch 10, the rotating shaft 9 is provided with a synchronous belt driving wheel 11, and the synchronous belt driving wheel 11 is coaxial with the wheelchair driving wheel 53 through the synchronous belt 6 The synchronous belt driven wheel 23 is connected, and the inner two ends of the synchronous belt driving wheel 11 are provided with spring lock blocks 12, and the two spring lock blocks 12 are respectively fixed on the two ends of the lock block connecting rod 13, and the lock block connecting rod 13 is provided with two The connecting rod slider 15 is provided with a gear 16 on the rotating shaft 9, and the side of the gear 16 is provided with two radial slide rails 17. When the gear 16 is rotated, the connecting rod slider 18 drives the lock under the limit of the radial slide rail 17 The connecting rod 13 moves up and down, and the outer side of the connecting rod slide rail 17 is provided with two buckles 18 to lock the state of the connecting rod. The outer side of the gear 16 is provided with a swingable dial 19, and the dial 19 passes through the dial connecting rod 20 It is connected with the steering control handle 21. When it is necessary to change direction, turn the steering control handle 21 to drive the dial 19 to engage the gear 16, and the gear 16 drives the locking block connecting rod 13 to move, thereby driving the original locking block to disengage, and at the same time the other locking block Locked to complete steering control.

In this embodiment, the multifunctional wheelchair also includes a five-item seat linkage mechanism, a manual brake mechanism, a retractable and retractable storage board mechanism, and a seat board that is convenient for going to the toilet.

The five-item seat linkage mechanism includes simultaneous linkage of five aspects such as seat board 37, pedal 27, backrest 26, folding backrest 25 and headrest 24, and the lower part of the front end of seat board 37 is hinged with pedal connecting rod 28, The lower end of the pedal connecting rod 28 is fixedly connected with the pedal 27, the headrest 24 is connected with the folding backrest 25 through the multistage hinged connecting rod 22 and the folding lock 51, and the folding backrest 25 is then passed through the multistage hinged connecting rod 22, folding Lock buckle 51 is connected with backrest 26, and backrest 26 is provided with lumbar by spring steel sheet, and lumbar back cushion 40 is set close to waist by spring steel sheet, and the lower side of backrest 26 is provided with air pressure rod 31, and air pressure rod 31 is controllable. One end of the air pressure rod 31 is hinged to the rear end of the wheelchair frame, the other end of the air pressure rod 31 is hinged to the seat board 37, the front ends of both sides of the seat board 37 are respectively provided with sliders 321, the backrest 26 is hinged with the seat board 37, and the backrest 26 is two Side lower end is respectively provided with slide block 322, and wheelchair frame left side is respectively provided with a linear slide rail and an arc slide rail 33 front and back, and wheelchair frame right side front and rear is also respectively provided with a linear slide rail and an arc slide rail 33.

The linkage part of the seat plate 37 and the pedal 27 includes an L-shaped paddle 34, a paddle slide rail 35 and a wheelchair frame slide rail, the L-shaped paddle 34 is hinged on the wheelchair frame, and the L-shaped paddle 34 is provided with a paddle The slide rail 35, the paddle slide rail 35 and the wheelchair frame slide rail form a set angle, the slide block 321 at the front end of the seat plate 37 is located in the paddle slide rail 35 and the wheelchair frame slide rail at the same time, and the slide block 321 is hinged and pushed forward in addition. Rod 36, the other end of the front push rod 36 is hinged with the pedal connecting rod 28. When the slider 321 moves forward, the paddle slide rail 35 gradually overlaps with the wheelchair frame slide rail, and the other end of the L-shaped paddle 34 slowly pushes up. Lift seat plate 37, promote pedal connecting rod 28 to lift simultaneously. The linkage part of the backrest 26, the folding backrest 25 and the headrest 24 includes a fixed chute 45, a rotatable locking chute 75, a push rod slider 29, a lumbar spring steel sheet, a folding backrest 25, a headrest 24, and a multi-stage hinge connection. Rod 22 and slide rail, fixed chute 45 is arranged on the wheelchair frame, and rotatable locking chute 75 is arranged on the backrest 26, and when backrest 26 reclines, push rod slider 29 deviates from fixed chute 45 and rotates The locking chute 75 moves, and the movement of the multistage hinged connecting rod 22 drives the flattening of the lumbar cushion 40 and the support of the folding backrest 25 and the headrest 24. When the push rod slider 29 enters the rotatable locking chute 75, it will be pushed The rod slider 29 is locked, and the backrest 26 can continue to adjust the inclination backward.

The manual braking mechanism is arranged under the reciprocating armrest, and includes a disc brake and a brake handle. One end of the disc brake and one end of the brake handle are respectively hinged on the wheelchair frame, and the disc brake and the brake handle are connected by a brake cable. Connection, the top of the brake lever is equipped with a spring lock, which is convenient for the user to park safely when necessary.

The retractable storage board mechanism is arranged under the reciprocating armrests 1 on both sides of the wheelchair, and includes a storage board 47 and a hinged connecting rod 48. The storage board 47 and the hinged connecting rod 48 are connected by a rotatable lock. After 47 is unfolded, rotate the knob 49 on the storage board 47 to connect the storage boards 47 on both sides as a whole.

The middle part of the seat plate 37 is an elliptical hole, and the seat plate 37 is also provided with two rectangular soft cushions 41, and the oval hole position of the seat plate 37 is provided with a cushion plate 42 that coincides with the ellipse and is divided into two left and right pieces. The texture of the cushion board 42 is the same as that of the seat board 37; the seat board 37 is also provided with a base plate 43 with the same oval shape as the seat board, and the lower side of the seat board 37 is provided with a hinge 44, and the hinge 44 is connected by a hinge buckle. Bottom plate 43, the other side of bottom plate 43 is connected under seat plate 37 through lock buckle 46. The left and right cushion boards 42 described in this embodiment can be connected with the upper soft cushion 41 as a whole, or can be used independently.

The working principle of the present invention is as follows:

The combination of reciprocating motion conversion mechanism, switchable overrunning clutch mechanism and manual brake mechanism converts the linear reciprocating motion of the armrest into circular reciprocating motion, and then converts it into circular motion of the synchronous belt driving wheel, and then drives the driving wheel of the wheelchair forward or reverse movement and braking. Under the synergistic effect of each connecting rod, rotating shaft, locking block, slider, chute and air pressure rod, the five seat linkage mechanisms complete the simultaneous linkage of five aspects including the headrest, folding backrest, backrest, seat board and footrest. and adjust the sitting posture.

When the user goes to the toilet, the left and right sideways take off the left and right cushions and the cushion board respectively. After going to the toilet, the user can also open the base plate lock 46 by himself, so the base plate 43 swings to one side, and then removes the base plate by himself for cleaning and installation.

When the seat back 26 is tilted back at a certain angle, the push rod slider 29 slides out from the fixed chute 45 and enters the inside of the lock block 30 at the same time, and drives the lock block 30 to rotate along the axis 57. When the lock block 30 rotates 90° Finally, the shift fork 54 pops up, preventing the reset of the lock block 30, and the push rod slider 29 is locked inside the lock block 30, and no longer moves relative to the seat back;

When the seat back 26 was reset, the push rod slider 29 entered the chute, and the secondary shift block 55 rotated along the axis 58 after touching the block 56, driving the shift fork 54 to rotate along the axis 59, and the shift fork 54 was locked. The locking of block 30 is released, and locking block 30 resets under the effect of spring force, and releases the locking effect to push rod slider 29, and push rod slider 29 resumes the relative movement trend with seat back 26;

When the push rod 60 slides along the chute 61 under the action of the chute, the auxiliary push rod 62 slides along the chute 63, and at the same time drives the upper end of the lumbar support 64 to slide, so that the raised height of the lumbar support 64 decreases;

When the push rod 60 moved upward along the chute 61, the push rod 65 was pushed to move upwards while rotating along the hinge point 66; the push rod 65 pushed the push rod 68 to slide along the chute 69 by the hinge point 67; The point 70 pushes the folding backrest 25 to rotate along the axis 71;

When the folding backrest 25 rotates along the axis 71 , the rocker 501 rotates along the axis 72 , and through the hinge point 73 , the rocker 502 is pulled to rotate along the hinge point 74 , and the headrest 24 is opened accordingly.

The retractable and expandable storage board 47 is telescopically expanded by the hinged connecting rod 48. When the storage board 47 is used, the storage boards 47 on both sides are pushed up, rotated and laid flat, and after the storage board 47 is launched, rotate the The knob 49 and the storage boards 47 on both sides are connected as one, and the storage boards 47 on the left and right sides can also be used separately.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. It should be pointed out that for those of ordinary skill in the art, some improvements can also be made without departing from the technical principle of the present invention. and modifications, these improvements and modifications should also be considered as the protection scope of the present invention.

Claims (9)

1. a kind of wheelchair frame of the multifunctional wheelchair, including bottom equipped with universal wheel and driving wheel, wheelchair frame be provided with seat plate, Backrest and pedal, it is characterised in that：Reciprocation conversion mechanism is separately installed with the both sides of wheelchair frame handrail, it is described Reciprocation conversion mechanism includes moving back and forth handrail, support bar, pulley, guide rail, swing connecting bar, rotary shaft, the pendulum with slide rail Lever, swing slide block and a set of changeable overrunning clutch mechanism, the reciprocating motion handrail lower section is by support bar and setting Pulley connection in guide rail, the lower section of pulley is connected with two swing connecting bars being hinged, described swing arm one end with slide rail It is hinged with swing connecting bar, the other end of the swing arm with slide rail is connected in wheelchair frame by bearing, the swing arm with slide rail Swing slide block is inside provided with, slide block is swung and is connected with the changeable overrunning clutch mechanism, by the reciprocating motion interpreter The straight reciprocating motion for moving back and forth handrail is converted into structure the circular motion for swinging slide block, then by changeable overdrive clutch machine Structure drives the driving wheel of wheelchair to move forward or backwards；

The changeable overrunning clutch mechanism includes closing piece connecting rod, forward or backwards rotary shaft, overdrive clutch, the closing piece connecting rod Slide block will be swung and be connected to rotary shaft, rotary shaft is connected in wheelchair frame by bearing, and rotary shaft surmounts with forward or backwards Clutch is connected, and rotary shaft is provided with Timing Belt driving wheel, and Timing Belt driving wheel is coaxial with wheelchair driving wheel by Timing Belt Timing Belt driven pulley connects, and Timing Belt driving wheel inner side two ends are provided with spring closing piece, and two spring closing pieces are separately fixed at closing piece The two ends of connecting rod, closing piece connecting rod is provided with two connecting rod sliders, and rotary shaft is provided with a gear, and gear side is provided with two radial directions Slide rail, during rotate gear, connecting rod slider moves up and down in the spacing lower drive closing piece connecting rod of radial direction slide rail, and connecting rod slide rail outside sets Have two buckles to lock the state of the connecting rod, gear outside is provided with a swingable thumb wheel, thumb wheel by wheel connecting rod with Course changing control handle connects, and when commutation is needed, rotates course changing control handle, drives thumb wheel occlusion gear, gear driven closing piece Link motion, so as to drive former locking closing piece to depart from, while another closing piece locking, so as to complete course changing control.

2. multifunctional wheelchair according to claim 1, it is characterised in that：Also include five seat cushion linkage mechanisms, five seats Chair link gear includes being linked while seat plate, pedal, backrest, folding back and headrest, and seat plate front lower portion is hinged Have a pedal connecting rod, pedal connecting rod lower end is fixedly connected with pedal, headrest and folding back by multistage articulated linkage and Fold latch button is attached, and folding back is attached again by multistage articulated linkage, folding lock with backrest, and backrest is provided with Lumbar spring steel plate, waist rest cushion is close to the setting of Lumbar spring steel plate, and the lower section side of backrest is provided with air pressure rod, and air pressure rod is controllable Formula air pressure rod, one end of air pressure rod is hinged wheelchair frame rear end, and the other end of air pressure rod is hinged seat plate, seat plate both sides front end Slide block is respectively provided with, backrest is hinged with seat plate, backrest both sides lower end is respectively provided with slide block, wheelchair frame is respectively equipped with one before and after left side Individual line slide rail and a circular arc, are also respectively equipped with a line slide rail before and after wheelchair frame right side and a circular arc is slided Rail.

3. multifunctional wheelchair according to claim 2, it is characterised in that：The linkage portion subpackage of the seat plate and pedal L-shaped plectrum, plectrum slide rail and wheelchair frame slide rail are included, L-shaped plectrum is articulated with wheelchair frame, L-shaped plectrum is provided with plectrum cunning , into a set angle, the slide block of seat front edge of board is simultaneously located at plectrum slide rail and wheelchair for rail, plectrum slide rail and wheelchair frame slide rail In framework slide rail, slide block be separately hinged one before push rod, the front push rod other end and pedal rod hinge connection when slide block is moved forward, are dialled Piece slide rail progressively overlaps with wheelchair frame slide rail, the other end of L-shaped plectrum slowly jack-up seat plate, while promoting pedal connecting rod Lift.

4. multifunctional wheelchair according to claim 2, it is characterised in that：The linkage of the backrest, folding back and headrest Part includes fixed chute, rotatably locks chute, push rod slide block, Lumbar spring steel plate, folding back, headrest, multistage is hinged Connecting rod and slide rail, fixed chute is arranged in wheelchair frame, and rotatable locking chute is arranged on backrest, when backrest hypsokinesis, Push rod slide block is deviate from from fixed chute and to rotatable locking chute movement, by the motion of multistage articulated linkage waist rest cushion is driven Be closed flat and folding back and headrest are propped, by push rod slider locks after push rod slide block enters rotatable locking chute, Backrest can continue to adjust inclination backward.

5. multifunctional wheelchair according to claim 1, it is characterised in that：The seat plate middle part is oval hole, seat It is additionally provided with the soft cushion of two pieces of rectangles on the plate of position, the oval hole location of seat plate is provided with coincide and be divided into left and right two with oval The seating pad of block, the quality of the seating pad is identical with seat plate.

6. the multifunctional wheelchair according to any one of claim 1-5, it is characterised in that：Also include hand-operated breaking mechanism, Hand-operated breaking mechanism is arranged on the lower section for moving back and forth handrail, including disc brake, brake lever, one end of disc brake and brake lever One end is respectively hinged in wheelchair frame, is attached with brake bracing wire between disc brake and brake lever, and the top of brake lever sets There is spring to latch.

7. multifunctional wheelchair according to claim 6, it is characterised in that：Also include the scalable shelf mechanism that takes down the exhibits, institute State the scalable shelf mechanism that takes down the exhibits and be arranged at the lower section that wheelchair both sides move back and forth handrail, including shelf, articulated linkage, put Thing plate is attached with articulated linkage using rotatable lock, after shelf launches, the knob on shelf is rotated, by both sides Shelf connect as one.

8. multifunctional wheelchair according to claim 5, it is characterised in that：It is additionally provided with the seat plate with seat plate with ellipse The base plate of toroidal, side is provided with hinge under seat plate, and hinge snaps connection base plate by hinge, and the opposite side of base plate is by lock Button is connected under seat plate.

9. multifunctional wheelchair according to claim 5, it is characterised in that：Described two pieces of seating pads in left and right and the soft seat in upper strata Pad can be connected as one, and also can independently be used.